John strother thurman



(No Model.)

, J. S.-THURMAN.

PUEL oIL BURNER. No. .505,931. Patented Oct. 3, 1893.

/NVENTOH 7 UNITED STATES PATENT I FFICE.

JOHN STROTHER THURMAN, OFVINDIANAPOLIS, INDIANA.

FUEL-OIL BURNER.

SPECIFICATION forming part of Letters Patent No. 505,931, dated 0ctober3, 1893. Application filed November 30, 1892. Serial No. 453.656. (No model.)

To all whom it may concern:

Be it known that I. JOHN STROTHER THUR-.

MAN, acitizen of the United States, residing at lndianapolistin the county of Mariou and State of Indiana, have invented certain new andusefulIrnprovement-sinFuel-OilBurners; and I do declare the following to be a full,

clear, and exact description of the invention,

.sides of the combined oil and steam jet; and

to so construct the mixer that all of its parts may be easily accessible for cleaning and repars. v

The accompanying drawings illustrate my invention.

Figure 1 is a plan. Fig. 2 represents a central longitudinal section. Fig. 3 represent a transverse section at -a- Fig. 2. Fig. 4 represents a tran sverse section at -b- Fig. 2.

In the drawings, A, indicates a j et-pipe having two longitudinal passages, B, and C, which are distinct and separate from each other. Passage B, is connected by pipe D, to a source of oil supply; and passage C, is connected by a pipe E, with asource of supply of steam under pressure. That end of the jet-pipo which is farthest from the supply pipes is closed, withthe exception of two small orifices, F, and G, which communicate, respectively with the passages B and C. Orifice G, is arranged, preferably, parallel with the passage C, while the orifice F is inclined from the passage B downward, at an acute angle, toward the orifice G; and the outer face of the end of the jet-pipe is hollowed out or cup-shaped,'as at H; the purpose being to compel the oil as it A, is a semi-spherical hollow casting, I, to

which the miXing-chamber, J, is Secured by r screws K.

Mounted in the base of the miXing-chanber is a short cylindr'cal sleeve, L,'having in its periphery an annular groove; the arrangement being such that, When the sleeve isin position, an annular passage, M, is formed between the sleeve and the walls of the mixing-chamber.

MiXing-chamber J, is provided, on oppositc sides, with a pair of tubular projections, N, N, which communicate with a source of air supply and with the annular passage M. The air-passage M, communicates with the interior of sleeve L through a series of radial perforations, O, in the sleeve, and communicates also with the interier of the miXing-chamber through a series of` longitudinal perforations, P.

The arrangenent of casting I, jet-pipo A, mixing-chamber J, and sleeve L, is such that the casting closes the rearend of the mixingchamber and the end of the jet-pipo projects within the sleeve.

In operation, the oil, and steam under pressized and blown forward into the miXing-chamber; air being thereby drawn through the tubular extensions, N, N, enters the passage M, and a portion, passing through the perforations O, O, is evenly distributed on all sides of the jet-pipo and mingles with the combined steam and oil, while another portion of the air'passes through the longitudinal perforations N, into the mi'xing-chamber and is there combined with the gases fromthe steam and oil, which are ignited at the open end of the miXing-chamber. By this construction the air is introduced in numerous small jets, and is evenly distributed throughout the ,mass of oil and steam, thus insuring a perfect combustion. It will be observed that, on removing the mixing-chamber from the casting I, the sleeve L may be slipped out of the base of the niXing-chamber, and the perforations O and P may be easily cleaned.

I claim as my invention- IOO 1. In a fuel oil burner, the combination with C, for oil and stean respectively, and the mixing chamber having one or more air supply passages N, of the cylindrical ring L, having a pe'ipheral groove and mounted in the base of the rnixing-chamber so as to form therewith an annular air passage M, said ring being provided at the bottom of the groove with a. series of radial perforations O, which connect the interior of the ring with the annular air passage, and provided also in its inne' face with aseries of longitudinal perfo'ations P, connecting said air passages with the interior of the mixing chanber, said ring being held fi'mly in place between two projections when chamber J and casting I are bolted together, all substantially as and for the purpose set forth.

2. In a fuel oil burner, comprising the com pound jet-pipe A, having passage B, provided with the inclined discharge opening F, and passageC having opening Gr, said openings being connected by the cup-shaped depression H, the hollow casting I, and the mixing `sion H, the hollow casting I, and the mixing chanber J, provided with the cylindrical perforated sleeve L, and air passages N, N which communicate with a source of air supply, ali substantially as and for the purpose set fo'th. In testimony whereof I affix my signature in presence of two witnesses.

J NO. STROTHER THURMAN. Wtnesses:

ALBERT RABB, DUANE H. BoWLEs. 

